21200351031012 has 24 divisors (see below), whose sum is σ = 49467645662176. Its totient is φ = 7066760830848.

The previous prime is 21200351031011. The next prime is 21200351031023. The reversal of 21200351031012 is 21013015300212.

It is a super-3 number, since 3×21200351031012³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21200351031012.

It is not an unprimeable number, because it can be changed into a prime (21200351031011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246443 + ... + 6629805.

Almost surely, 2^{21200351031012} is an apocalyptic number.

It is an amenable number.

21200351031012 is an abundant number, since it is smaller than the sum of its proper divisors (28267294631164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200351031012 is a wasteful number, since it uses less digits than its factorization.

21200351031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711547 (or 5711545 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 21200351031012 its reverse (21013015300212), we get a palindrome (42213366331224).

The spelling of 21200351031012 in words is "twenty-one trillion, two hundred billion, three hundred fifty-one million, thirty-one thousand, twelve".